Brake mechanism



W. C. BAKER.

BRAKE MECHANISM.

APPLICATION FILED MAR. 14, 1919.

Patented Aug. 22, 1922;.

I Inuzyfag: M/fer 'G BX'er' (Ittorncj To ell'whomimzwq concern I citizen of the United States, and airesident WALTER C.

BAKER, or CLEVELAND, orno, nssienon. To run STANDARD" rears COMPANY, or CLEVELAND, 01110, s. CORPORATION or 01510.

- m ne mnc'naivism.

Be it known that I, WALTER C BA R, a

of Cleveland, count vof Cuyahoga, State of 'Ohio, have invente certain new and useful Improvements in Brake Mechanlsm, of

which the followingis a specification.-

This invention relates to brake mecha ne object of the invention is to provide supporting means for-the brake shoes, which will, effectively hold hthem in position, but' permit them to be readily dismounted. An-

other object of the inventionis to provide removal of the shoes.

I such at mounting thatthe brake. shoes themselves may be used as 'leverarms to release resilient holding means and to 2 permit ready Further objects of the inventionlconsist of co relating the parts and causing them to coact; as hereinafter described and claimed.

For the purpose of-illustration, I have, in

the accompanying drawings, shown and described structures embody ng my invention. Figure 1- is-a view in elevation of t brake section; r

Y j Figure 2 is va' ifraginentary side elevation,

showing the brake drum partly broken away to disclose a sectional view of part of the brake shoe structure;

Figure 3 is a fragmentary detail of the pivoted ends of the brake shoe in position for dismounting;

' comprising;

Figure 1 is a section on-line 4.4 of Figure3';and Fi re 5 is a perspective viewof cam mem ers s led, to more clearly showeir. construction.- v

Inthe drawings, 1 indicates of brake -drum,which is attached to a vehicle wheel anot'shown, and rotates there with, being driven b anaxle 2 and supported upona tub 'ar axle}. Mounted" upon the tubular-axle-is a' brake anchor 4- diametrically extending arms 5 and 6.- T e pin 7 clamped near the end I of the arm 6, to furnish a pivot upon which the brake shoes Sand -9 are mounted forrotation.. These shoes are normally held in inoperative position by a spring 10. The oonstructioncontemplated involves the use of a usual form:

Specification of letters Patent. Patented Aug. 22, 1922. Application filed March. 14,1919. Serial No. 282,636.

two pairs of" brake shoes, one pair being lo cated on each side of the brake anchor, as in my prior Patent No. 1,132,541, March 16, 1915, but as their construction, andfthat of their pivoting and operating means,- are identical, but one pair will be described.

The free ends of these brake shoes are adapted to be separated-by lever mechanism or-by camsoperated by the shafts I1 and 12, each shaft'operating one pairof shoes, as in my aforesaid Patent No. 1,132,541. The pivoted ends of the "shoes are recessed as shown in 13, to slidably engage over blocks or ivot members 14 and 15, which a'reprefera ly provided with 'diagonal lubricating grooves, as shown" in Figure 5 and the blocks are, in turn, mounted upon the pin 7. The brake shoes are thus capable of a slight radial movement with reference to pin 7 to position themselves in the drum, but are rigidly anchored against rotation around the shaft 2 and swing with blocks'14 and 15 about the pin 7. 'I he pin- 7 is provided at the end with a head or nut 16, and betweenslich head or nut and. the adjacent brake rattling.

Because of the friction produced by spring 17 between the brake shoes and the" arm 6, it is difficult to slide the brakeshoes on and ofi of the blocks'14 and 15 when it is desired to renew them, or any of their parts, or'to repair and clean the same. In

order to compress the spring and release the brake shoes'from this side clamping, I formthe blocks 1'4 and 15" with interfittlng cam. faces, as shown more particularly at 19 and 20 in Figure 5. .The raised face 19 fits'into the depression 20 when the parts are in their normal assembled relation, but when it is desired to remove or replace the brake shoes, the wheel 'wlth the drum 1 is removed axi-' ally, the spring 10. unhooked from'one or vbothofthe shoes and the shoes with their ;.i respective blocks 14 and 15 swung from the position'shown in Fi position indicated raised surface 19 on the block 14 thereby res 1 and 2 to the igures 3 and 4, the

being positioned at right'angles to the de-- pression- 20 and effecting a separation of the blocks 14 and 15, so as to compress spring 17 and relieve the side-pressure on the brake shoes so that they may then be freely revention which is, defined in the appended claims. v 1 Having thus 7 described my invention,

preferred form of a invention, it will be' understood that moved from or replaced on the blocks 14;

and15.

While i have illustrated and described a device embodying my 7 changes may be made in the details of construction, without departing from the spirit of'the inwhat I claim is: l

1. In brake mechanism, the combination of a brakedrum, a brake shoe, means for resiliently holding said brake shoe against.

normally holding said brake s oe against lateral movement relative to the central plane of rotation of said drum, and means operable by said shoe for releasing said holding meansi 5 q 1 R 3. In brake mechanism, the-combination of a brakedrum, abrake shoe movable into engagement therewith, means resiliently engaging saidshoe'to hold it against lateral movement relative to the central plane of rotation of said drum, and means for mov-,

ing said holding means vout ofengagement with said shoe,

Lin brake mechanism, the combination of a brake drum, brake shoes .pivotallyone end, means normally mounted at coopcrating With the pivoted ends of said shoes tohold them against lateralmovement relative'to the central plane of rotationof said drum, and. means for positively moving saidholding means from cooperating relation with said shoes.

5. In brake mechanism, the combination I of a. brake drum, brake shoes pivotally' Macaw mounted at one end, actuating means for.

w1t-h said drum, means 7 engaging said shoes for resiliently holding'the pivoted-ends of said shoes against lateral movement relative to the central plane ofrotation of said drum, and means operable by pivotal move:

ment of said shoes-for releasing said 1101a;

ing means. L x I. I

6. In brake mechan1sm,the ,combinatlon of a brake. drum, a

brake shoe support com prising a pivot, bearing members mounted;

.on said pivot, brake shoes having recesses"- at the ends thereofto receive said bearing members, and actuating means for said brake shoes-, said bearing'members having cooperating cam faces whereby relative ro- 'tation will cause them to separate along the axis'of the pivot.

7. In brakemechanism, the combination i of a brake drum, a brake shoesupport comprising a pivot, members rotatably mounted thereon, brake shoesslidably mounted at one end upon 'said members, and resilient means for holding the pivoted-ends of'said brake shoes againstlateral movement rela'- tive to the central plane of rotation of said drum, said members being-formed with cooperating cam, faces, whereby relative rotation of the members will release said shoes from said holding means. I

8. In brake mechanism, the combination of a brake drum, a brake shoe support comprising a pivot, members mounted side-byside; thereon, brake shoes having their ends overlapped and slidably mounted upon said members, means resiliently compressing the overlapped ends of brake shoes together,

said

from said means.

ture." WALTERC. BAKER.

members being formed with cooperatingcam surfaces and adapted, upon-relative rotation, to release said overlapped "ends 8 5" llntestimony whereof I afiix my signa- 

